Analysis of factors affecting DES absorption capacity: Observation of differences by constituent elements of DES using tetravalent ammonium salts and polyamines

Abstract

A material called DES(Deep Eutectic Solvent), which is being studied as a next-generation carbon dioxide wet absorbent, is being newly researched. DES is a material made by simple physical mixing of HBA and HBD materials. DES is capable of both physical absorption, which traps carbon dioxide in its structure, and chemical absorption using an amine group, so it has a much higher absorption capacity than previous generation absorbents. In this study, we will fabricate several DESs using tetravalent ammonium salt as HBA and polyamine material as HBD. Afterwards, the factors affecting the absorption capacity for the halogen element of the tetravalent ammonium salt, the number of carbon chains, and the number of amine groups will be identified, and FT-IR, NMR, and DSC analysis will be conducted. In addition, we try to analyze the absorption mechanism more accurately by comparing each absorption capacity value.